Indicating and recording device.



PATENTED FEB. 27, 1906.

w. H. BRISTOL. v 4 IINDICATINJ} A D REGDRDING DEVICE.

APPLICATION FILED MAY 6, 1905,

ix/humus move over an unsupported portion of a chart,

UNITED STATES PATENT. OFFICE- WILLIAM H. BRISTOL,

INDICATING AND RECORDING DEVICE.

Application filed Kay 6,1

1'0 all, whom it may concern:

Be it known that I, WILLIAM H. BRISTOL, a citizen of the United States, and a resident of New York city, in the county of New York and State of New York, have invented certain new and useful Improvements in Indicating and Recording Devices, of which the following is a specification.

My invention relates to means for rendering indicating and recording devices extremely sensitive and accurate, and especially to certain means whereby I am able to directly record the movements of an indicating-arm the actuating force of which is insufficient to make direct records by the usual methods, all intermediate mechanism, such as relays, 800., being dispensed with.-

For this purpose my invention consists, essentially, of an indicating and recording device having an indicating-arm adapted to means to rotate said chart, and means to independently vibrate said chart or said indicating-arm, 1

The nature of my invention will best be understood when described in connection with the accompanying drawings, inwhich Figure 1 is an elevation of a devicefor indicating and recording electrical ressures or currents and chan es therein, slowing the cover removed an a portion of the chart broken away. Fig. 2 is an'end view of the device, partly in section.

Similar numerals of reference designate corresponding parts throughout both views.

Referring now to the drawin s, 1 represents a voltmeter or ammeter of the standard type having the usual recbrding elements-- viz., an indicating-arm 2, preferably flattened and provided with a marking-point 3, and a chart 4, such as the smoked chart dis- (losed in my prior atent, No. 748,918, of January 5, 1904. T e chart 4 is mounted to rotate with the spindle 5, actuated by the clock mechanism 6, and is backed for about one-half its surface by a segmental plate 7, connected to the casing of the meter by the pins 8. A portion of the chart 4 in the vicinity of the indicating-arm is thus left perfectly free to vibrate.

9' a vibrating mechanism to vibrate the portion of the chart 4 over which the arm 2 acts. It consists, essentially, of the bellcrank 10, mounted upon the shaft 11 and held in position by the spring 12, ,hich also serves Specification of Letters Patent.

OF NEW YORK, N. Yf

- reamed Feb. 27, 1906.

905. 8eria11Io.259,156.

the extremity of the arm 13 is a suitable wei ht 14 to store the energy and is capped wit a felt pad 15. Upon the wheel 16 of the clock mechanism 6 I provide a number of vertical-pins or blocks 17 and so arrange them that they will periodically Wi e the arm 18 of the bell-crank as the whee 16 of the clock As the wheel 16 remechanism revolves. volves the arm 18 of the bell-crank will be forced backward in 0 position to the spring 12 by the pins or bl dcks 17 and when released will be caused to vibrate by the sprin 12. The pad on the arm 13 of the bel crank is thereby-caused to strike the chart 4 and to transmit the. vibration of the bell-' urements I prefer, however, to use the smoked chart and a non-inking markingpoint, the point simply serving to remove a small portion of the carbon wheneverit The chart 4 may of course be of comes into. contact with the chart. ,I may also cause the indicating-arm to vibrate instead of he chart by ver slightly tapping the former by similar mec anism; I prefer,

however, to vibrate the chart or a small por-' tion of the chart in vicinity of the marking point, thereby reducing the stress on the delicate bearings to a minimum. I do not wish to restrict myself to. the particularmeans of vibration shown, as the vibratingmechanism may be operated, by an independent clock mechanism, by magneticmeans, or the chart vibrated directly by pneumatic means, &c. By thus vibrating either chart or indicatingarm the vibration is more or less communicated from one to the other, and a series of dots is formed upon the chart, producing a practically continuous line and record of the movement of the arm. .A practically continuous vibration may be obtained by the proper arrangement of the pins or blocks'l? upon the wheel 16.

I am aware that attempts have been made to record the duration of motion or rest of a to vibrate the arm-13 of the ell-crank. At

vehicle by the vibration of an arm which received its vibration from the jarring of the vehicle to which it is attached; but I definitely vibrate one of the recording elements independently of the entire instrument and vibrate it whether the support of the instrument is in? motion or not.

In preventing contact of the arm with the chart exce tduring momentary periods prac-.

ticallyall ricti on between the arm and chart is eliminated, the friction being onl instantaneous. The arm therefore has t 1e greatest possible freedom of motion, and the device is rendered most accurate and capable of extreme sensitiveness, allowing of the recording of the movements of the arm Without any intermediate mechanism, even though the force actuating the arm be extremely weak.

What I claim asmy invention, and desire to secure by Letters Patent, is

1. In an indicating and recording device, a combined indicating and recording arm, a chart backed or sup orted over only a portion thereof, the active or unsupported portion being left perfectly free to vibrate where by the im )act etween the recording elements is gradua ly taken up, and means to cause transverse vibrations of one of the recording elements at said active or unsupported portion.

2. In an indicating and recording device, a combined indicating andrecording arm, a chart backed or supported over only a portion thereof, the active or unsupported portion being left perfectly free to vibrate means to independently vibrate said chart at said active or unsupported portion.

4. In an indicating and recording device, an indicating-arm, a chart backed or suppor ed over only a portion thereof, the active or unsupported portion being left perfectly free to vi rate whereby the impact between the recording elements is gradually taken u p and means to periodically vibrate said chart at said active or unsupported portion,

5. In an indicating and recording device, an indicating-arm, a smoked chart backed or supported over only a portion thereof, the

active or unsupported portion being left perfectly free to vibrate whereby the nnpact between the recording elements is gradually taken up and means to independently vibrate said chart at said active or unsupported portion.

6. In an indicating and recording device, a flattened indicating-arm, a revoluble chart backed or supported over only a portion thereof, the active or unsupported portion being left perfectly free to vibrate whereby the impact between the indicating elements is gradually taken up and means to independently vibrate said chart at said active or unsupported ortion.

7. In an int icating and recording device, a flattened indicating-arm provided with a marking-point, a smoked revolublc chart unsupported over its active portion, clock mechanism, a bellcrank, and means in connection with said clock mechanism to vibrate said bell-crank, and means connected to the bell crank to vibrate said active portions.

8. In an indicating and recording device, an indicating-arm, a chart hacked and supported over substantially one-half its surface by a late, the active portion being unsupported and free to vibrate, clock IDCClISLIIISI II to revolve said chart, a bell crank held in po' sition by a spring, pins or blocks mounted.

upon a wheel of said clock mechanisnrand adapted to. wipe one arm of'said bellcrank causing it tothereby vibrate said chart.-

9. In an indicating and recording device, a chart unsupported over its active portion, means to vibrate the'active portion of said chart and means to limit the vibration of said active portion of the chart.

Signed at New York, in the county of New York and State of New York, this 4th day of May, 1905.

WILLIAM H. BRISTOL.

Vi itn es'ses:

Fannrf. F. Sonunrz, ROEN l I-I: YUDIZKY. 

